icy vs frosty

icy and frosty both are adjectives.

Word	Noun	Adjective	Verb	Adverb
icy	No	Yes	No	No
frosty	No	Yes	No	No

As adjectives, icy and frosty are synonyms defined as:

icy and frosty: devoid of warmth and cordiality; expressive of unfriendliness or disdain

Other synonyms of icy include frigid, frozen, glacial, wintry.

icy (adjective)	frosty (adjective)
extremely cold	devoid of warmth and cordiality; expressive of unfriendliness or disdain
devoid of warmth and cordiality; expressive of unfriendliness or disdain	pleasantly cold and invigorating
covered with or containing or consisting of ice	covered with frost
shiny and slick as with a thin coating of ice